Separable attachment-plug.



R. B. BENJAMIN.

'SEPAHABLE ATTACHMENT PLUG.

APPLICATION FILED AUG. 13. 1915.

Patenteq Dec. 11, 1917;

REUBEN 1B. BENJAMIN, OF CHICAGO, ILLINOIS, ,ASSIGNQIR TOBENJ'AMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SEPABABLE ATTACHMENT-PLUG. I

Original application filed. November 21, 1908, Serial No; 463,764. Divided and. this application filed August 13, 1915. Serial No. 45,296. L a

To all whom it may concern:

Be it known that I, REUBEN B. BENJAMIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Separable Attachment-Plugs, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming :1 art of this specification.

r y invention relates to separable attachment plugs, which, as is well known, consist of two members, one of which is provided with contacts for cooperation with the contacts 0f the socket, and the other of which carries binding terminals, these members being detachably, connected together in such manner that, when assembled, electrical connection is made between the contacts on the one member and the binding terminals on the other member. Such a plug is shown in my copending application Serial No. 463,764, filed Nov. 21, 1908, of which application this application is a division. 1

Fig. 3 is an lnverted plan view of the other member;

Fig. 4 is a vertical axial section of the plug; and

Fig.5 is a reduced fragmentary view of one of the details of the device.

In the form of my invention illustrated herein, the part which carries the socket terminal engaging contacts consists of a shell. 10. adapted for insertion into the socket, and a body 11, which carries binding terminals to which are secured the flexible conductors leading to the fan or other electric current consuming device, the body 11 belng'removaextending circumferential bead 15 and an outwardly extendino circumferential bead .16 intermediate its ends, the beads 15 and 16 being preferably located adjacent each other and immediately below the termination of the screw threaded portion of the sleeve. I

Surrounding the lower portion of the sleeve 12, and held between the flange 13 and the head 16, is a'ring 17 formed of insulating material, such as hard rubber or the like, and having an outwardly extending flange 18 which is preferably knurled. at its periphery to provide a firm hold for the fingers of the user. A cup-shaped block 19 of insulatingmaterial is inserted in the upper end of the sleeve 12 and has formed thereon an outwardly extending flange 20 which abuts against the flange 1 1. The block 19 is held in place by an insulating ring 21 located between the lower side of its flange 20' and the bead 15 of the sleeve 12.

The block 19 is formed with a centralaperture 22 in which is secured the center contact of the plug. The center contact consists of a tubular member 23 which passes through the aperture 22 and is bent outward to form a flange 24 outside theblock 19. The

. tubular member 23' is also formed with a fiange 25, within the block 19 One end of a resilient inner contact 26, which preferably consists of a substantially U-shaped plate of spring brass, surrounds the tubular member 23 and is clamped between the flange 25 and the inner side of the block 19.

The sleeve 12 is formed with inwardly extending bayonet projections 27 adjacent its lower edge, said projections tapering slightly upward to one side for a purpose to be hereinafter described. A small excrescence 28 is formed adjacent the thicker end of one of the projections 27. By building up scribed, instead of,

the shell as above deas is usual n earlier forms or" separable plugs, constructing it at twist, while slight twist in 'the opposite direction is suflicient to detach 1t.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. A separable attachment plug comprising an insertible portion having a contact for engagement with the contact of a receptacle, and a ortion having a quick detachable connection with said first portion,

a binding terminal supported by said second portion, and conductor gripping means also supported by said second'portion.

2. A separable attachment plug compris ing an insertible portion having a shell contact'for engagement with the shell contact of a receptacle, and a portion having a quick detachable connection-with said first portion, a binding terminal supported by said second portion, and c'onductor gripping means also supported by said second portion.

3. A separable attachment plug compris ing an insertible portion having a contact for engagement with the contact of a receptacle, and a ortion having a quick detachable connection with said first portion, a binding terminal supported by said second portion, and conductor gripping means also supported by said second portion, said conductor gripping means comprising a tubular thumb piece through which said 'conductor extends. v 4:. A separable attachment plug comprising aninsertible portion having a contact for engagement with the contact of a-recepk tacle, and a portion havin a quick'detachable connection with said first portion, said second portion including two members having a threaded connection with each other and having cotiperative conductor grippingmeans, and a binding terminal supported by one of said members.

5. A separable attachment plug comprising an insertible portion having a contact for engagement with the contact of a receptacle, and a portion havin a quick detachable connection with said rst portion, said second portion including two membershaving a threaded connectlon withv each other and having cooperative conductor gripping means, and a binding terminal supported by one of said members, 'the other member being constructed to form a thumb piece.

6. A separable attachment plug comprising an insertible portion having a contact for engagement with the contact of a receptacle, and a portion havin a quick detachable connection with said rst portion, said second portion including two members having a threaded connect1on with each other and having coiiperative conductor. gripping means, and a binding terminal supported by one of said members, the other member being constructed to form a thumb piece, said thumb piece having an opening through which the conductor extends for engagement with the binding terminal.

7 A separable attachment plug compriseing an insertible portion having a contact for engagement with the contact of a receptacle, and a portion havin a quick detachable connection with said rst portion, said second portion including two insulating members having cooperating conductor gripping means, a binding terminal supported by one of said members, and means for connecting said members comprising a shell supported by one of said members and having a screw threaded connection with the other.

8. A separable attachment plug comprising an insertible po tion having a contact for engagement with the contact of a receptacle, a portion having a quick detachable connection with said first portion, said sec-' ond portion including two insulating members having cooperating CODdIlGtOI gripping means, a binding terminal supported by one of said members, and means-for connectin said members comprising a shell supporte by one of said members and having a screw threaded connection with the other, one of said members having an opening'through which the conductor extends for engagement with said binding terminal.

' 9. A quick-detachable separable connector device comprising an insulating support, a quick-detachable contact supported thereby,

. a second'insulating support, a second quicknick-detachable contact supported thereby or quick-detachable engagement with said first contact, a binding-terminal supported by said second insulating sup ort and elec-' trically connected with said second contact, and conductor-gripping means for, the conductor leading to said binding-terminal, also supported by said second insulatingsupport, said conductor-gripping means com prising a tubular thumb-piece through which said conductor may extend.

11. An electrical device comprising an insulating base having an opening therein a conductor member supported thereby, an a tubular metal rivet extending "through said opening for seeming said conducwr member to base, said tubuiar member being or" at each end to secure the parts in piece a rding a passage "for an electrirein eiectricei device comprising an inig base hsving an openlng therein,- a con nctor member supported thereby said conductor member having registertures. and a tubular metal rivet exthro said apertures and flanged i for securing said conductor c said base, said tubular member passage for an electrical con- "i eiectricai device comprising an inbase having an opening therein, a iate supported thereby, said base ng-piate having registering apertubuiar member extending gpiate' to said base, said tubular r affording a passage for an eiectricai motor leading to said binding-plate.

An eiectricai' device comprising an insiiiating base having an opening therein, a winding-piste supported thereby, said base and binding-flats having registering aperteres, a tubuiar member extending through apertures securing said bindingto said base, said tubuiar'member er- 'gh said apertures for securing said.

iording s passage eieetricai conduc- 15. An electrical device comprising an in I suiatlng base hav ng an opening thereln,

shell and center contacts supported thereby, a, binding-plate also supported thereby and electrically connected with center contact, and a tubular metal member extending through said opening for securing said binding-plate to said base, tubular member afi'ording a passage for an eiectricai'conduo tor leading to said binding-plate, 16. An electrical device comprising an in suiating base, a binding-plate supported thereby, said base and binding-plate having registering apertures, sheii' and center con tacts also supported by said insulating base, said center contact being electrically connected with said binding-plate, and a tubuiar metal member extending through said apertures for securin binding-piste to said base, said tubular member aiiording a passage for an eiectricei conductor leading to said binding-piste.

Witness whereof, I have hereunto snbscribed my name, 

